Gadpiparty ZOSI 4K POE Security Cameras System with 2TB Hard Drive,8CH H.265+ 4K NVR and 4PCS 4K 8MP Surveillance Cameras

Two Way Audio: The 4pcs PoE IP camera Built-in mic and speaker let you stay in touch with your household. So you can talk to your kids or tell your dog to stop barking, or say hello to the delivery man through the Free Zosi Smart App.
Stable Plug and Play PoE System: A single ethernet cable runs power and video transmission simultaneously between the 4K NVR and 8MP IP camera, making it easier to set up. Unlike the CCTV DVR systems, videos from the IP camera system will not be degraded or destroyed by cables. The digital signal will keep a real 8mp high-definition image via ethernet cables.
Smart Motion Detection: This camera is alert and ready to react to any potential danger via a smart light alarm system. Be notified when there are unexpected movements. Smart notifications with images will be pushed to your smartphone via the ZOSI Smart app. You also can set up the detection zone from your DVR to minimize false alarms.
Remote Access: The free App ZOSI smart lets you see all of your cameras in one place. Check in on your home or business wherever you have an internet connection. Free app for live view & Playback on smart devices with Wi-Fi or 2G/3G/4G anywhere anytime.
24/7 Recording: Built-in 2TB Security Grade Hard Drive, users are provided reliable 24/7 recording.Support ultra-long continuous recording and backup by USB. NVR can be set to automatically overwrite the oldest internally stored footage or you can transfer those video files by USB to a memory stick or external Hard Drive.